Question
Explain how amino acid substitutions can affect protein structure and function.
Answer :
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Amino acid substitutions arise from changes in the nucleotide sequence of a gene and can influence protein structure and function in diverse ways depending on the nature and position of the substituted residue. Proteins rely on precise amino acid sequences to fold into specific three-dimensional conformations stabilized by hydrogen bonds, ionic interactions, hydrophobic forces, and disulfide bridges. Even a single substitution can disrupt these interactions and alter protein behavior. Conservative substitutions involve replacement of an amino acid with another having similar physicochemical properties, such as charge or hydrophobicity. These changes often have minimal effects on protein structure and function because the overall folding pattern and interactions are maintained. In contrast,
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